Issues with new phone

I ordered the IPhone 6s rose gold on online upgrades by calling *** on Tuesday 20 Oct . I received my phone the next day, I purchased & inserted the glass screen protector on the same day. I also loaded all my backup & updated the software from IOS 9.1 to 9.2. On Friday this phone didn't want to update the applications & I couldn't receive emails, whatsups, etc. I also noticed that the calculator does not load or work when the screen is lock (i used to use the calculator on my IPhone 5 when the screen was locked). I tested this functionality on the IPhone 6 used by my colleague. I called online upgrade & spoke to Masilo on Friday @13:53 and he logged a call for the phone to be replaced, however he mentioned that they cannot replace my screen protector & I will have to restart the process of loading my info again (which cost me data as is). He recommended that I go to the nearest Vodacon store and see is the issue will be fixed. I want to Vodacom flamwood walk on Saturday & spoke to Idris who checked & confirmed the problem but unfortunately could not admit further. I am happy to take a new phone but vodacom it is unfair to spend again on protector &data to reload the phone.